About ATS Bookkeeping
Bookkeeping, payroll, tax, and advisory services for small businesses across Fairfax, Northern Virginia, and the DMV. Built on two decades of finance experience.
ATS Bookkeeping & Advisory Services
20+
Years of Finance Experience
QBO
Certified ProAdvisor
Most small business owners in the DMV have already been through this. You try handling the books yourself and they fall behind. You hire a bookkeeper and spend more time checking their work than it would take to do it yourself. You call a larger firm and the quote doesn't make sense for where your business is right now.
ATS Bookkeeping was built for the space between those options. We bring the structure of a corporate finance function to businesses that need it but aren't ready to build one in-house. That means consistent bookkeeping, payroll that runs on time, tax preparation that doesn't surprise you, and advisory support when you need to make a real decision about the direction of your business.
Our clients include construction companies tracking job costs, healthcare practices managing complex revenue, real estate investors with multiple entities, law firms, freight and logistics operators, and nonprofit organizations that need clean 990 filings. Each of these industries handles money differently, and we've built our processes to account for those differences instead of forcing everyone into the same template.
We work remotely through secure platforms with regular check-ins and clear communication. When something needs attention, we bring it to you. We don't wait for you to find it in a report three months later. The goal is straightforward. You should always know where your business stands and never have to wonder whether the numbers are right.
Andrew T. Swaby
Founder & CEO
Andrew is the founder and Chief Executive Officer of ATS Bookkeeping & Advisory Services and the author of Numbers That Matter: A Business Owner's Guide to Smart Financial Choices. He holds a QuickBooks ProAdvisor certification, a Bachelor's Degree in Professional Management from Nova Southeastern University, and a Management Development Certificate from Harvard Business School.
Before starting ATS, Andrew spent over two decades in banking and executive finance. He held leadership roles at National Commercial Bank Jamaica and the Jamaica National Group, where he oversaw credit, risk management, and operations. That experience gave him something most bookkeepers simply don't have. He has sat on the lender's side of the table and evaluated businesses seeking capital. He knows what banks look for in your financials, what raises concerns, and what gives them confidence to approve a loan.
That perspective shapes how ATS approaches every engagement. The books aren't just a compliance exercise. They're the foundation for how you manage cash flow, how you plan for growth, and how you present your business when it matters most. Andrew started this firm because he saw too many capable business owners held back by financials that didn't reflect how well the business was actually performing. Late reports, unclear numbers, and no one available to explain what any of it meant for the decisions they needed to make.
Today ATS works with small and mid-sized businesses across Fairfax, Northern Virginia, and the broader DMV. Andrew is directly involved in every client relationship and can be reached at any time.
Kayon Ellis
Executive Director of Operations
Kayon Ellis serves as Executive Director of Operations at ATS Group, leveraging a robust background in operations management, accounting, real estate, and client service to drive organizational success. With deep experience in the outsourcing and offshoring industry, Kayon excels at building high-performing teams, streamlining business processes, and delivering exceptional client outcomes.
She is certified in QuickBooks and Xero and holds a Bachelor's Degree in Accounting from the University of the West Indies. Kayon's leadership combines operational excellence, entrepreneurial spirit, and a commitment to continuous improvement, making her a key asset to the ATS Group operations leadership team.
Devonia Mejia
Tax Professional
Devonia Mejia is a Certified Public Accountant with more than 10 years of experience in tax, accounting and reporting, and advisory services. Devonia holds a Master's Degree in Business from Florida Atlantic University, and a Bachelor's Degree in Accounting and Finance from Florida State University.
Within the past 10 years, Devonia has developed a niche for small to mid-sized businesses, helping them through bookkeeping and record keeping, tax preparation, business startups, accounting review and records consolidation, and audit assistance.
Justin Dean
Director of Marketing and Payroll Services
Justin Dean is the Director of Marketing and Payroll Services at ATS Group, where he drives growth through strategic marketing while helping clients across industries—law firms, startups, medical practices, and construction companies—manage and streamline their payroll operations.
With over a decade in finance and business operations, Justin spent eight years as a licensed banker before moving into bookkeeping, payroll, and advisory services. He supports ATS through J. Dean Enterprises LLC (est. 2022), his marketing and strategic advisory firm focused on helping professional service firms improve visibility and operational systems.
Justin is also an active entrepreneur, including a vending machine business in Atlanta, giving him a practical perspective when advising clients on growth and efficiency.
He is a QuickBooks Certified ProAdvisor and holds a Financial Accounting Certificate from the Wharton School at the University of Pennsylvania, along with a B.S. in Finance from SUNY College at Old Westbury.
Outside of work, Justin writes and researches the intersection of economics, urban development, and finance—publishing through his newsletter One Less Lane and contributing to the Foundation for Economic Education (FEE).
Gary Dickson
Tax Professional, Enrolled Agent
Gary Dickson holds a Master of Business Administration (2007) and a Master of Accounting (2010) from Nova Southeastern University. With over 15 years of experience, he specializes in preparing both individual and business income tax returns, as well as providing CFO services.
Gary's expertise is particularly valuable to small businesses, offering tailored financial guidance to help ensure long-term success.
Northern Virginia's Bookkeeping & Advisory Firm
First Step:
Tell Us About Your Business
Every engagement starts with a conversation. Tell us what's going on with your books and we'll give you our honest assessment.